Speaking to IGN Microsoft corporate vice president Marc Whitten said that the Day One update to the Xbox One console (the mandatory update you'll have to install before you can start using the shiny new next-generation console system) will take 15 - 20 minutes to download and install. The patch makes it so that the system can function both online and offline, but first you'll have to connect the system to a Microsoft server online so it can be patched.

"We are optimizing Xbox One so that the day one update is as fast as possible," Whitten said. "While we're still finalizing the details, we expect that the download will take between 15 and 20 minutes for most users."

Microsoft did not say how big the update is, but it will likely take up some extra space on that 500 GB Hard Drive...

It was supposed to take an hour for the Wii U Day One patch - ended up taking me almost 20, between system errors and server-side connection issues.

Oh, well - at least it won't require two TV's to set it up initially, like with my Wii U (since the Wii U doesn't automatically detect how you're connected to a TV, and mine wasn't set to HDMI, I had to use my bedroom TV for inital setup, then move the Wii U to the living room).

Plus you could opt to play while it downloaded in the background...but in a persons defense Nintendo could have been MUCH clearer about that feature lol. People waited because they (me included) thought we had to wait for it to download first. Probably why it now clearly says so with this and I believe the last update too.